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WASHINGTON (NewsNation Now) — A spokesman says Vice President Mike Pence will continue with his campaign schedule after his chief of staff, Marc Short, tested positive for the coronavirus Saturday.

Pence spokesman Devin O’Malley says Pence and his wife, Karen Pence, both tested negative for the virus on Saturday and remain in good health. The pair tested negative again on Sunday.

Pence chief of staff Marc Short and “a couple of key staff surrounding the vice president” have tested positive for the virus, White House chief of staff Mark Meadows said Sunday.

Short is Pence’s closest aide and the vice president is considered a “close contact” under Centers for Disease Control and Prevention guidelines. O’Malley says that “in consultation with the White House Medical Unit, the Vice President will maintain his schedule in accordance with the CDC guidelines for essential personnel.”

Those guidelines mandate that essential workers exposed to someone with the coronavirus closely monitor for symptoms of COVID-19 and wear a mask whenever around other people.

After a day of campaigning Saturday, Pence was seen wearing a mask as he returned to Washington aboard Air Force Two once the news of Short’s diagnosis was made public.

President Donald Trump commented on Short early Sunday after his plane landed at Joint Base Andrews, outside Washington. “I did hear about it just now,” he said. “And I think he’s quarantining. Yeah. I did hear about it. He’s going to be fine. But he’s quarantining.”